A local server that connects Claude Code to a Cairn account, where coding sessions, file edits, and tasks are recorded. It runs from a Python package and needs a Cairn token and server address.

Use it to send session, file-change, and task records to Cairn while Claude Code is running.

It removes the need to record this work history by hand.

cairn-mcp — MCP server by cybort360/cairn

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo

git clone --depth 1 https://github.com/cybort360/cairn

Made for: Claude Code, Codex, Cursor, Gemini CLI, OpenCode.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/mcp/cybort360/cairn/cairn-mcp/github.svg)](https://agentmods.dev/mcp/cybort360/cairn/cairn-mcp)

Your own site

<a href="https://agentmods.dev/mcp/cybort360/cairn/cairn-mcp"><img src="https://agentmods.dev/badge/mcp/cybort360/cairn/cairn-mcp/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/mcp/cybort360/cairn/cairn-mcp"><img src="https://agentmods.dev/badge/mcp/cybort360/cairn/cairn-mcp.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session not measured What this adds to a session before it is invoked.

When invoked not measured Not applicable: nothing here is loaded into a session.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Security

Grade A, and why

cairn-mcp scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

server.json · 12 lines

What it actually says

{
  "cairn-mcp": {
    "command": "uvx",
    "args": [
      "cairn-mcp"
    ],
    "env": {
      "CAIRN_TOKEN": "",
      "CAIRN_API_URL": "https://cairn-octanes-projects.vercel.app"
    }
  }
}

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

1mo ago First seen · 12 lines scan A 3bcb2b42e1a9

Subscribe to this mod's changes

cairn-mcp is an MCP server published in the GitHub repository cybort360/cairn (0 stars, last pushed 4mo ago), licensed MIT. Its token cost is not measured: an MCP server costs its tool schemas, not its config file. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Claude Code Memory and context claude claude-code-plugin mcp model-context-protocol

cairn-mcp

Getting it into your agent

Wrote this? Show the measurements

Grade A, and why

Nothing flagged

What it actually says

What this file has done since we first saw it

Other mcp servers, from other repositories

engram

hypermnesia-mcp

tokenmizer

data-olympus

code-context

bitatlas